Motor bicycle



FIG. 1 is front, left perspective view of a motor bicycle showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plain view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a motor bicycle, as shown. 